{"id":30266,"date":"2020-10-13T11:21:45","date_gmt":"2020-10-13T18:21:45","guid":{"rendered":"https:\/\/devblogs.microsoft.com\/dotnet\/?p=30266"},"modified":"2021-06-08T11:52:45","modified_gmt":"2021-06-08T18:52:45","slug":"net-framework-october-2020-security-and-quality-rollup-updates","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/dotnet\/net-framework-october-2020-security-and-quality-rollup-updates\/","title":{"rendered":".NET Framework October 2020 Security and Quality Rollup Updates"},"content":{"rendered":"<p><strong>Revised 6\/8\/2021:<\/strong> On June 8th, 2021, this update was released to replace a previous update to address a \u201crevocation server was offline\u201d error that may occur during installation. If you&#8217;ve already installed a previous release\u00a0of this update, no action is required.<\/p>\n<p><strong>Revised 4\/15\/2021:<\/strong> On April 13th, 2021, this update was released to replace a previous release of this some updates. See known issues section for more details. If you&#8217;ve already installed a previous release of an affected update, no action is required.<\/p>\n<p><strong>Revised 1\/15\/2021:<\/strong> <em>Added known issues details for <strong>ASP.Net applications may not deliver cookieless tokens in the URI<\/strong><\/em><\/p>\n<p>Today, we are releasing the October 2020 Security and Quality Rollup Updates for .NET Framework.<\/p>\n<h3>Security<\/h3>\n<h5><a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2020-1693\" rel=\"nofollow\">CVE-2020-16937<\/a>\u2013 .NET Framework Information Disclosure Vulnerability<\/h5>\n<p>An information disclosure vulnerability exists when the .NET Framework improperly handles objects in memory. An attacker who successfully exploited the vulnerability could disclose contents of an affected system&#8217;s memory. To exploit the vulnerability, an authenticated attacker would need to run a specially crafted application. The update addresses the vulnerability by correcting how the .NET Framework handles objects in memory.<\/p>\n<p>To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE).<\/p>\n<ul>\n<li><a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/CVE-2020-1693\" rel=\"nofollow\">CVE-2020-16937<\/a><\/li>\n<\/ul>\n<h3>Quality and Reliability<\/h3>\n<p>This release contains the following quality and reliability improvements.<\/p>\n<h5>ASP.NET<\/h5>\n<ul>\n<li>Disabled resuse of AppPathModifier in ASP.Net control output.<\/li>\n<li>HttpCookie objects in the ASP.Net request context will be created with configured defaults for cookie flags instead of .NET-style primitive defaults to match the behavior of `new HttpCookie(name)`.<\/li>\n<\/ul>\n<h5>CLR<span style=\"font-size: 12pt;\"><sup>1<\/sup><\/span><\/h5>\n<ul>\n<li>Added a CLR config variable Thread_AssignCpuGroups (1 by default) that can be set to 0 to disable automatic CPU group assignment done by the CLR for new threads created by Thread.Start() and thread pool threads, such that an app may do its own thread-spreading.<\/li>\n<li>Addressed a rare data corruption that can occur when using new API\u2019s such as Unsafe.ByteOffset which are often used with the new Span types. The corruption could occur when a GC operation is performed while a thread is calling Unsafe.ByteOffset from inside of a loop.<\/li>\n<\/ul>\n<h5>SQL<\/h5>\n<ul>\n<li>Addressed a failure that sometimes occured when a user connects to one Azure SQL database, performed an enclave based operation, and then connected to another database under the same server that has the same Attestation URL and performed an enclave operation on the second server.<\/li>\n<\/ul>\n<h5>Windows Forms<\/h5>\n<ul>\n<li>Addressed a regression introduced in .NET Framework 4.8, where Control.AccessibleName, Control.AccessibleRole, and Control.AccessibleDescription properties stopped working for the following controls:Label, GroupBox, ToolStrip, ToolStripItems, StatusStrip, StatusStripItems, PropertyGrid, ProgressBar, ComboBox, MenuStrip, MenuItems, DataGridView.<\/li>\n<li>Addressed a regression in accessible name for combo box items for data bound combo boxes. .NET Framework 4.8 started using type name instead of the value of the DisplayMember property as an accessible name, this improvement uses the DisplayMember again.<\/li>\n<\/ul>\n<h5>WCF<span style=\"font-size: 12pt;\"><sup>2<\/sup><\/span><\/h5>\n<ul>\n<li>Addressed an issue with WCF services sometimes failing to start when starting multiple services concurrently.<\/li>\n<\/ul>\n<p><sup>1 <\/sup>Common Language Runtime (CLR)\n<sup>2 <\/sup>Windows Communication Foundation (WCF)<\/p>\n<div id=\"section-3\" class=\"ng-scope\" data-js-in-page-navigation-anchor=\"section-3\">\n<h2 class=\"c-heading-4 f-lean bold ng-binding\">Known issues in this security update<\/h2>\n<\/div>\n<div>\n<h4><strong>ASP.Net applications fail during precompilation with error message<\/strong><\/h4>\n<\/div>\n<div class=\"section-body ng-scope\" style=\"box-sizing: inherit; outline: none; color: #000000; font-family: 'Segoe UI', SegoeUI, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial;\">\n<div class=\"ng-scope\" data-grid=\"col-12\">\n<div class=\"ng-isolate-scope\" data-grid=\"col-12\">\n<p class=\"ng-scope\"><strong>Symptoms<\/strong>\nAfter you apply this October 13, 2020 Security and Quality Rollup for .NET Framework 4.8, some ASP.Net applications fail during precompilation. The error message that you receive will likely contain the words \u201cError ASPCONFIG.\u201d<\/p>\n<p><strong>Cause<\/strong>\nAn invalid configuration state in either the \u201csessionState,\u201d \u201canonymouseIdentification,\u201d or \u201cauthentication\/forms\u201d sections of \u201cSystem.web\u201d configuration. This might occur during build-and-publish routines if configuration transformations leave the Web.config file in an intermediate state for precompilation.<\/p>\n<p><strong>Workaround<\/strong>\nCustomers who observe new unexpected failures or functional issues can implement an application setting by adding (or merging) the following code to the application configuration file. Setting either \u201ctrue\u201d or \u201cfalse\u201d will avoid the issue. However, we recommend that you set this value to \u201ctrue\u201d for sites that do not rely on cookieless features.<\/p>\n<pre class=\"ng-scope\">&lt;?xml version=\"1.0\" encoding=\"utf-8\" ?&gt;\r\n&lt;configuration&gt;\r\n      &lt;appSettings&gt;\r\n          &lt;add key=\u201daspnet:DisableAppPathModifier\u201d value=\u201dtrue\u201d \/&gt;\r\n     &lt;\/appSettings&gt;\r\n&lt;\/configuration&gt;<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<div>\n<h4><strong>ASP.Net applications may not deliver cookieless tokens in the URI<\/strong><\/h4>\n<\/div>\n<div class=\"section-body ng-scope\" style=\"box-sizing: inherit; outline: none; color: #000000; font-family: 'Segoe UI', SegoeUI, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial;\">\n<div class=\"ng-scope\" data-grid=\"col-12\">\n<div class=\"ng-isolate-scope\" data-grid=\"col-12\">\n<p class=\"ng-scope\"><strong>Symptoms<\/strong>\nAfter you apply this October 1, 2020 Security and Quality Rollup for .NET Framework 4.8, some ASP.Net applications may not deliver cookieless tokens in the URI, possibly resulting in 302-redirect loops or lost or missing session state.<\/p>\n<p><strong>Cause<\/strong>\nThe ASP.Net features for Session State, Anonymous Identification, and Forms Authentication all rely on issuing tokens to a web client, and they all allow the option for those tokens to be delivered in a cookie or embedded in the URI for clients that don\u2019t support cookies. The URI-embedding has long been an insecure and disrecommended practice and this KB quietly disables issuing tokens in URI\u2019s unless one of these three features explicitly requests a cookie mode of \u201cUseUri\u201d in configuration. Configurations that specify \u201cAutoDetect\u201d or \u201cUseDeviceProfile\u201d may inadvertently result in attempted and failed embedding of these tokens in the URI.<\/p>\n<p><strong>Workaround<\/strong>\nCustomers who observe new unexpected behavior are recommended to change all three cookieless settings to \u201cUseCookies\u201d if possible.<\/p>\n<pre class=\"ng-scope\">&lt;?xml version=\"1.0\" encoding=\"utf-8\" ?&gt;\r\n&lt;configuration&gt;\r\n     &lt;system.web&gt;\r\n          &lt;anonymousidentification cookieless=\"UseCookies\" \/&gt;\r\n          &lt;sessionState cookieless=\"UseCookies\" \/&gt;\r\n          &lt;authentication&gt;\r\n               &lt;forms cookieless=\"UseCookies\" \/&gt;\r\n          &lt;\/authentication&gt;\r\n     &lt;\/system.web&gt;\r\n&lt;\/configuration&gt;<\/pre>\n<p>If an application absolutely must continue using URI-embedded tokens and can do so safely, then they can be re-enabled with the following appSeting. But again, it is highly recommended to move away from embedding these tokens in URI\u2019s.<\/p>\n<pre class=\"ng-scope\">&lt;?xml version=\"1.0\" encoding=\"utf-8\" ?&gt;\r\n&lt;configuration&gt;\r\n     &lt;appSettings&gt;\r\n          &lt;add key=\"aspnet:DisableAppPathModifier\" value=\"false\" \/&gt;\r\n     &lt;\/appSettings&gt;\r\n&lt;\/configuration&gt;<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<h4><strong>ASP.Net applications may not deliver cookieless tokens in the URI<\/strong><\/h4>\n<div class=\"section-body ng-scope\" style=\"box-sizing: inherit; outline: none; color: #000000; font-family: 'Segoe UI', SegoeUI, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial;\">\n<div class=\"ng-scope\" data-grid=\"col-12\">\n<div class=\"ng-isolate-scope\" data-grid=\"col-12\">\n<p class=\"ng-scope\"><strong>Symptoms<\/strong>\nAfter you apply this October 1, 2020 Security and Quality Rollup for .NET Framework 4.8, some ASP.Net applications may not deliver cookieless tokens in the URI, possibly resulting in 302-redirect loops or lost or missing session state.<\/p>\n<p><strong>Cause<\/strong>\nThe ASP.Net features for Session State, Anonymous Identification, and Forms Authentication all rely on issuing tokens to a web client, and they all allow the option for those tokens to be delivered in a cookie or embedded in the URI for clients that don\u2019t support cookies. The URI-embedding has long been an insecure and disrecommended practice and this KB quietly disables issuing tokens in URI\u2019s unless one of these three features explicitly requests a cookie mode of \u201cUseUri\u201d in configuration. Configurations that specify \u201cAutoDetect\u201d or \u201cUseDeviceProfile\u201d may inadvertently result in attempted and failed embedding of these tokens in the URI.<\/p>\n<p><strong>Workaround<\/strong>\nCustomers who observe new unexpected behavior are recommended to change all three cookieless settings to \u201cUseCookies\u201d if possible.<\/p>\n<pre class=\"ng-scope\">&lt;?xml version=\"1.0\" encoding=\"utf-8\" ?&gt;\r\n&lt;configuration&gt;\r\n     &lt;system.web&gt;\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &lt;anonymousidentification cookieless=\"UseCookies\" \/&gt;\r\n\u00a0 \u00a0 \u00a0     &lt;sessionState cookieless=\"UseCookies\" \/&gt;\r\n          &lt;authentication&gt;\r\n               &lt;forms cookieless=\"UseCookies\" \/&gt;\r\n          &lt;\/authentication&gt;\r\n     &lt;\/system.web&gt;\r\n&lt;\/configuration&gt;<\/pre>\n<p>If an application absolutely must continue using URI-embedded tokens and can do so safely, then they can be re-enabled with the following appSeting. But again, it is highly recommended to move away from embedding these tokens in URI\u2019s.<\/p>\n<pre class=\"ng-scope\">&lt;?xml version=\"1.0\" encoding=\"utf-8\" ?&gt;\r\n&lt;configuration&gt;\r\n     &lt;appSettings&gt;\r\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &lt;add key=\"aspnet:DisableAppPathModifier\" value=\"false\" \/&gt;\r\n     &lt;\/appSettings&gt;\r\n&lt;\/configuration&gt;<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<table>\n<tbody>\n<tr>\n<td class=\"\"><b class=\"ocpLegacyBold\">Symptom<\/b><\/td>\n<td>Customers using Windows 7 SP1, Windows Server 2008 R2 SP1 or Windows Server 2008, this update does not install, and it returns either or both of the following error messages:<\/p>\n<ul>\n<li>-2146762495<\/li>\n<\/ul>\n<ul>\n<li>A required certificate is not within its validity period when verifying against the current system clock or the timestamp in the signed file.<\/li>\n<li>\n<p class=\"\">The revocation function was unable to check revocation because the revocation server was offline.<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td><b class=\"ocpLegacyBold\">Workaround<\/b><\/td>\n<td>\n<p style=\"margin: 0in; font-family: 'Segoe UI'; font-size: 10.0pt; color: #1e1e1e;\">This issue was corrected by the latest release of this update. If you&#8217;ve already installed a previous release of this update, no action is required.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><\/h3>\n<h3><a id=\"user-content-getting-the-update\" class=\"anchor\" href=\"#getting-the-update\"><\/a>Getting the Update<\/h3>\n<p>The Security and Quality Rollup is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog. The Security Only Update is available via Windows Server Update Services and Microsoft Update Catalog.<\/p>\n<h5><a id=\"user-content-microsoft-update-catalog\" class=\"anchor\" href=\"#microsoft-update-catalog\"><\/a>Microsoft Update Catalog<\/h5>\n<p>You can get the update via the Microsoft Update Catalog. For Windows 10, NET Framework 4.8 updates are available via Windows Update, Windows Server Update Services, Microsoft Update Catalog. Updates for other versions of .NET Framework are part of the Windows 10 Monthly Cumulative Update.<\/p>\n<p>**Note**: Customers that rely on Windows Update and Windows Server Update Services will automatically receive the .NET Framework version-specific updates. Advanced system administrators can also take use of the below direct Microsoft Update Catalog download links to .NET Framework-specific updates. Before applying these updates, please ensure that you carefully review the .NET Framework version applicability, to ensure that you only install updates on systems where they apply.<\/p>\n<p>The following table is for Windows 10 and Windows Server 2016+ versions.<\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"8px\">\n<thead>\n<tr>\n<th>Product Version<\/th>\n<th colspan=\"2\">Cumulative Update<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 Version Next and Windows Server, Version Next<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578967\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578967\" rel=\"nofollow\">4578967<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10, version 20H2 and Windows Server, version 20H2<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578968\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578968\" rel=\"nofollow\">4578968<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 2004 and Windows Server, version 2004<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578968\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578968\" rel=\"nofollow\">4578968<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1909 and Windows Server, version 1909<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578974\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578974\" rel=\"nofollow\">4578974<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1903 and Windows Server, version 1903<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578974\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578974\" rel=\"nofollow\">4578974<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1809 (October 2018 Update) and Windows Server 2019<\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4579976\" rel=\"nofollow\">4579976<\/a><\/strong><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578966\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578966\" rel=\"nofollow\">4578966<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578973\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578973\" rel=\"nofollow\">4578973<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1803 (April 2018 Update)<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4580330\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4580330\" rel=\"nofollow\">4580330<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578972\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578972\" rel=\"nofollow\">4578972<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1709 (Fall Creators Update)<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.7.1, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4580328\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4580328\" rel=\"nofollow\">4580328<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578971\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578971\" rel=\"nofollow\">4578971<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1703 (Creators Update)<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.7, 4.7.1, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4580370\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4580370\" rel=\"nofollow\">4580370<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578970\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578970\" rel=\"nofollow\">4578970<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1607 (Anniversary Update) and Windows Server 2016<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4580346\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4580346\" rel=\"nofollow\">4580346<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578969\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578969\" rel=\"nofollow\">4578969<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 10 1507<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5, 4.6, 4.6.1, 4.6.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4580327\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4580327\" rel=\"nofollow\">4580327<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The following table is for earlier Windows and Windows Server versions.<\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"8px\">\n<thead>\n<tr>\n<th>Product Version<\/th>\n<th colspan=\"2\">Security and Quality Rollup<\/th>\n<th colspan=\"2\">Security Only Update<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2<\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4579979\" rel=\"nofollow\">4579979<\/a><\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4580469\" rel=\"nofollow\">4580469<\/a><\/strong><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578953\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578953\" rel=\"nofollow\">4578953<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578981\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578981\" rel=\"nofollow\">4578981<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.5.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578956\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578956\" rel=\"nofollow\">4578956<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578984\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578984\" rel=\"nofollow\">4578984<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578962\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578962\" rel=\"nofollow\">4578962<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578986\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578986\" rel=\"nofollow\">4578986<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578976\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578976\" rel=\"nofollow\">4578976<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578989\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578989\" rel=\"nofollow\">4578989<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows Server 2012<\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4579978\" rel=\"nofollow\">4579978<\/a><\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4580468\" rel=\"nofollow\">4580468<\/a><\/strong><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578950\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578950\" rel=\"nofollow\">4578950<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578978\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578978\" rel=\"nofollow\">4578978<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.5.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578954\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578954\" rel=\"nofollow\">4578954<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578982\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578982\" rel=\"nofollow\">4578982<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578961\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578961\" rel=\"nofollow\">4578961<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578985\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578985\" rel=\"nofollow\">4578985<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578975\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578975\" rel=\"nofollow\">4578975<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578988\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578988\" rel=\"nofollow\">4578988<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows 7 SP1 and Windows Server 2008 R2 SP1<\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4579977\" rel=\"nofollow\">4579977<\/a><\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4580467\" rel=\"nofollow\">4580467<\/a><\/strong><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 3.5.1<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578952\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578952\" rel=\"nofollow\">4578952<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578980\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578980\" rel=\"nofollow\">4578980<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.5.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578955\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578955\" rel=\"nofollow\">4578955<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578983\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578983\" rel=\"nofollow\">4578983<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578963\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578963\" rel=\"nofollow\">4578963<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578987\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578987\" rel=\"nofollow\">4578987<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.8<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578977\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578977\" rel=\"nofollow\">4578977<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578990\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578990\" rel=\"nofollow\">4578990<\/a><\/td>\n<\/tr>\n<tr bgcolor=\"#F0F0F0\">\n<td><strong>Windows Server 2008<\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4579980\" rel=\"nofollow\">4579980<\/a><\/strong><\/td>\n<td><\/td>\n<td><strong><a href=\"https:\/\/support.microsoft.com\/kb\/4580470\" rel=\"nofollow\">4580470<\/a><\/strong><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 2.0, 3.0<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578951\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578951\" rel=\"nofollow\">4578951<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578979\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578979\" rel=\"nofollow\">4578979<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.5.2<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578955\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578955\" rel=\"nofollow\">4578955<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578983\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578983\" rel=\"nofollow\">4578983<\/a><\/td>\n<\/tr>\n<tr>\n<td>.NET Framework 4.6<\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578963\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578963\" rel=\"nofollow\">4578963<\/a><\/td>\n<td><a href=\"http:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=4578987\" rel=\"nofollow\">Catalog<\/a><\/td>\n<td><a href=\"https:\/\/support.microsoft.com\/kb\/4578987\" rel=\"nofollow\">4578987<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h5>Previous Monthly Rollups<\/h5>\n<p>The last few .NET Framework Monthly updates are listed below for your convenience:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/devblogs.microsoft.com\/dotnet\/net-framework-october-1-2020-cumulative-update-preview-update-for-windows-10-version-2004-and-windows-server-version-2004\/\" rel=\"nofollow\">.NET Framework October 1, 2020 Cumulative Update Preview Update for Windows 10, version 2004 and Windows Server, version 2004<\/a><\/li>\n<li><a href=\"https:\/\/devblogs.microsoft.com\/dotnet\/net-framework-september-2020-cumulative-update-preview-update\/\" rel=\"nofollow\">.NET Framework September 2020 Cumulative Update Preview Update<\/a><\/li>\n<li><a href=\"https:\/\/devblogs.microsoft.com\/dotnet\/net-framework-september-2020-security-and-quality-rollup-updates\/\" rel=\"nofollow\">.NET Framework September 2020 Security and Quality Rollup Updates<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Revised 6\/8\/2021: On June 8th, 2021, this update was released to replace a previous update to address a \u201crevocation server was offline\u201d error that may occur during installation. If you&#8217;ve already installed a previous release\u00a0of this update, no action is required. Revised 4\/15\/2021: On April 13th, 2021, this update was released to replace a previous [&hellip;]<\/p>\n","protected":false},"author":369,"featured_media":58792,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[195],"tags":[],"class_list":["post-30266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dotnet-framework"],"acf":[],"blog_post_summary":"<p>Revised 6\/8\/2021: On June 8th, 2021, this update was released to replace a previous update to address a \u201crevocation server was offline\u201d error that may occur during installation. If you&#8217;ve already installed a previous release\u00a0of this update, no action is required. Revised 4\/15\/2021: On April 13th, 2021, this update was released to replace a previous [&hellip;]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/posts\/30266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/users\/369"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/comments?post=30266"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/posts\/30266\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/media\/58792"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/media?parent=30266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/categories?post=30266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/dotnet\/wp-json\/wp\/v2\/tags?post=30266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}